Telephone system.



H. P. CLAUSEN.

TELEPHONE SYSTEM.

APPLICATION FILED DEC-29,1916,

1,246,882. Patented Nov. 20, 1917.,

3 SHEETSSHEET liz g //4 V? far.- henry C/aus an.

H. P. CLAUSEN.

TELEPHONE SYSTEM.

APPLICATION FILED 050.29.1916.

1 46,882. Patented Nov. 20, 1917.

3 SHEETS-SHEET 2- Mam/470;: Henry R. (/ausen.

b Md

H. P. CLAUSEN.

TELEPHONE SYSTEM.

APPLICATION FILED DEC-29.1916.

1 246,882. Patented Nov. 20, 1917.

3 SHEETS-SHEET 3- 0412223 0? Hen/y (/ausvn,

UNITED STATES PATENT OFFICE.

HENRY P. CLAUSEN, or MOUNT vERNoN, NEW YORK, ASSIGNOB. TO WESTERN ELECTRIC COMPANY, INCORPORATED, on NEW YORK, N. Y., a coRPoRA'noN E NEW YORK.

TELEPHONE SYSTEM.

Specification of Letters Patent.

Patented Nov. 20, 191 '7.

To all 'wlom it may concern:

Be it known that I, HENRY P. QLAUSEN, a citizen of the United States, residlng at Mount Vernon, in the county of Westchester and State of New York, have invented certain new and useful Improvements in Telephone Systems, of which the followlng is a full, clear, concise, and exact description.

This invention relates to telephone exchange systems, and more part cularly to the arrangement of selectlve switches within such a system.

The object of the invention 15 to provide means for equalizing, as fares posslble, the service performed by the indivldual connector switches, and in so doing to reduce the total number of such switches required.

A feature of the invention 1s an overflow connector switch which may be mul tipled to several levels of a preceding selector switch, and the provlsion of means within such over-flow connector swltch for automatically identifying the level of such selector switches from which a call is extended.

In the drawings, Figure 1 1s a front elevation of-ihe structural mechanism of an over-flow connector switch; Fig. 2 1s a top plan view of the same; Fig. 3 is a diagrammatic representation of the usual des gnation of the line terminals in an ordinary connector switch; Fig. 4 is a diagrammatic representation of the arrangement of line terminals in an over-flow connector swltch designed to serve four levels of a precedlng selector switch; Fig. 5 is a diagrammatic representation of the arrangement of line terminals in an over-flow connector switch designed to serve five levels of a preceding selector switch; Fig. 6 is a dlagrammatlc representation of the connections between a selector switch and an over-flow connector switch servin four levels of this selector switch; and Flg. 7 is a diagrammatic representation of the trunking arrangements within a system where over-flow connectors serving four levels of a preceding selector switch are used.

Referring now especially to F1gs. 1 and 2, these represent a structural embodiment of the invention whereby thedesired object is obtained and shows details of a selective switch of the up-and-around type and means for automatically identifying the group of lines to which a call is extended. The

switch employs a shaft 1, formed in its upper portlons in a rotary ratchet member 2, a vertical ratchet member 4, and a shaft 5 with a collar 6 attached at its upper end. Slidably mounted on the upper portion of the shaft are two collars 7 and 8 designed to be brought in engagement with the collar 6, and thereby elevate the brush shaft, in accordance with the energization of magnets 13 and 14, respectively, one or two steps to precletermine the position of the brushes. Also slidably mounted on the shaft is a rotary position-determining ratchet 9 held 1n permanent angular relation with the shaft through the member 3 working in the groove G. Secured to the shaft 1, below these various ratchet members, is a brush carriage 10 carrying a brush set 11 shown in association with a bank of contacts 12.

A frame to which the switch parts are mounted is shown in part at F. Securely mounted to this frame are two magnets 13 and 14:. The energization of magnet 14 is designed to lift the shaft one vertical step by the action of collar 8, while the energization of magnet 13 is designed to lift the shaft two vertical steps by the action of collar 7. Subsequent elevation of this shaft, through its ordinary stopping meansflzauses the shaft 5 to slide'through the collars 7, 8 and 9.

Also mounted on the frame F are two magnets 15 and 16. The energization of magnet 15 is designed to move the shaft one rotary step, while the energization of magnet 16 is designed to move the shaft two rotary steps. When not in operation the pawls P and P controlled by these magnets, do not interfere with other motions of the shaft.

A magnet 17 also secured to the frame F, actuates an armature and a pawl 18 to cooperate with the notches of the vertical ratchet member 4 in such a manner that, according to an easily made adjustment, the shaft 1 may be elevated either two or three vertical steps at a time. In a similar manner a rotary magnet 19 is provided and may be so adjusted as to rotate'the shaft either two or three rotary steps at a time. A member 20 controlled by magnet 21 con.- sists of two pawls mounted on a shaft 22 for engagement with the teeth-of the vertical and rotary ratchet members in such a way, that, after actuation of the shaft by the magnets 17 and 19, the position attained will be held until the release of the switch. This is accomplished through the energization of magnet 21.

Fig. 3 shows the usual numbering arrangement of the line terminals in a connector switch. There are usually ten levels and ten sets of contacts in each level. The first level contains lines designated from 11 to 20 inclusive; the second level contains lines designated from 21 to 30 inclusive; and so on.

In Fig. 4 a different arrangement is shown. In this case it will be noticed that in the first level and in the odd sets of terminals in this level, lines in the zero hundred from 11 to 20 inclusive appear.- If then the brushes of the switch are set on the first level and then driven in a rotary direction, they must pass two sets of terminals at each step, in order to keep within the same hundreds designation. It will be noticed that the even terminal sets belong to the third hundreds designation. The same is true in regard to the vertical arrangement. In other words, the zero and third hundreds designations appear only in the odd vertical levels, while the one and two hundreds designations appear in the even levels. Thus, with twenty levels and twenty rotary positions, four hundred lines are served in a connector switch of this type.

In Fig. 5 a scheme is shown whereby five hundred lines may be served. In this case the zero and third hundreds designations appear in the first, fourth, seventh, tenth, thirteenth, sixteenth, nineteenth, twentyfirst, twenty-fourth, twenty-seventh and thirtieth levels, and in these levels the zero hundreds designation appears in the odd positions, and the three hundreds designation in the even positions. The one hundreds, two hundreds, and four hundreds des ignations are arranged in a corresponding manner.

Suppose the scheme shown in Fig. 4 is used. If a call is extended by a selector switch, of which part of a bank of contacts SS is shown in Fig. 6, and in which the first level indicated by the first three vertical rows of contacts, is selected, and if the overflow connector switch whose contact bank is designated 0C is found idle, then the talking strands of the connection will be extended to conductors 20 and 21, and in turn to the brushes 6 and 22 The test conductor from the selector switch will be extended over the conductor 22, and brush b and upon the seizure of the connector switch the vertical and rotary magnets would proceed in the usual manner to drive the brushes b 6 and 6 into association with the terminals of the desired line.

It should be noted here that the normal position of the brushes is such that one double step in each direction must be taken to make connection with a set of terminals, and that if the primary and secondary magnets are actuated and the preliminary steppin magnets have not been energized, then the rushes will at the end of each step rest in turn on the first, third, fifth and all other odd numbered rows. If, however, the preliminary stepping magnets have been energized as will be more fully explained later, then the brushes will in turn rest on the terminals in the even numbered rows. In the present case each step taken by the switch in each direction will cause the brushes to move over two sets of terminals, so that should three vertical steps and two rotary steps be taken, the brushes will finally rest on the third set of terminals in the fifth level, and the line designated by the zero hundred and the thirty-second set of terminals in such hundred will be selected.

If, however, the call should be extended overthe second level of the selector switch SS, the test conductor will be extended over the conductor 23 instead of 22, and through the magnet V before joining the brush 6 The magnet V is one of two windings of magnet 14, either of which will energize magnet 14 and cause the shaft 1 to be elevated one vertical step. Upon the seizure of this over-flow connector switch one vertical step will immediately be taken, and upon the receipt of the external impulses the action before described will take place, only with this difference: The brushes now having been stepped one vertical step by the magnet 14, if three double steps are made under the control of the magnet 17 and two rotary steps are made under the control of magnet 19, a line in the sixth level and in the third rotary position will be selected, such line being the thirty-second line in the first hundred.

If a call comes in on the third, level of the selector switch, then the test conductor will be extended through the conductor 24, the magnet V and magnet R in series, before the brush is reached. The magnet V represents the other winding of the magnet 14 and the magnet R represents the winding of magnet 15, Hence, the seizure of this connector switch results in the immediate movement of such switch one vertical step and one rotary step. The latter movement of the brushes, in response to the external impulses will bring the brushes finally to rest on the fourth set of contacts in the sixth level, or rather the second even set of contacts in the third even level, and in this manner the thirty-second line in the second hundreds designation is reached.

In a similar manner the extension of a call over the fourth level extends the test conductor over conductor 25 and in this case through magnet R only, to brush 6 Upon the seizure of the switch one rotary step only is taken, the brushes being left in their original vertical position. Upon the receipt of external impulses the brushes will finally come to rest in connection with the secon even set of terminals in the rotary direction, and the third odd set of terminals in the vertical direction, and the thirty-second line in the third hundreds will be selected.

This arrangement allows of multipling only four levels in a selector switch. Since such switches are usually provided with ten levels, it will be seen that a special arrangement of such over-flow switches must be made, which arrangement will be explained in detail in connection-with Fig. 7.

The arrangement of lines indicated in Fig. 5 will accommodate five levels of a selector switch, and, therefore, only two over-flow connector switches are needed to serve such a switch. It should be noted, in connection with this figure, that the corresponding hundreds are found in every third level, and hence when such a connector switch is seized either two, one or no preliminary vertical steps may be taken, and

the primary magnet of such switch must be 7 arranged to elevate the brush carriage over three steps of contacts during each energization. The preliminary steps may be accomplished either by extending the test conductor directly into the test brush, as over conductor 22 to the brush 6*, or by extending the test conductor over one wlnding of the magnet 14 or over one winding of the magnet 13. The arrangement for the preliminary rotary displacement is the same as before, although provision is made in the structure of this switch for a double displacement, which might be used if a connector switch were to serve nine different hundreds instead of five different hundreds as here shown.

Referring now especially to Fig. 7 Which shows the trunking arrangement used in connection with a four-hundred-point 0ver flow connector switch. SS SS SS", and SS represent selector switches which may serve lines in a group, say, from 1000 to 2000. SS SS, SS and SS are selector switches which may serve a group of lines, say, from O to 1000. The first four levels of the selector switches SS SS SS and SS would then lead to connector switches serving lines from 0 to 400. The second four levels would lead to connector switches serving lines from 400 to 800. The last two levels of these selector switches and the first two levels of the selector switches SS SS SS and SS, lead to lines 800 to 1200. The third to the sixth levels, inclusive, in selector switches, SS SS SS and SS, lead to lines 1200 to 1600, and the last four levels of these selector switches lead to lines over-flow connector 1600 to 2000, Thus, five four-hundred-point switches serve two groups of preceding selector switches.

It is intended, as indicated in the selector switches SS to SS", that the first five sets of terminals in each level of each selector switch shall lead to connector switches CS CS etc., in the ordinary and well-known manner. Connection between such selector and connector switches is indicated by the cables C C C and C. connector switch 00 is intended to serve the lines terminating in the connector switches CS to CS, which lines, as previously mentioned, might be designated from 1600 to 2000.

The sixth to the tenth set of contacts in each level of each selector switch SS to SS is intended, and shown here, as leading to a four-hundred-point over-flow connector.

switch from which the call is extended with be preserved in the manner heretofore described by the preliminary setting of the brush set.

What is claimed is: I

1; In a telephone system, telephone lines arranged in grou s, selector switches, connector switches oa capacity to serve one group of lines each, connector switches of a capacity to serve a plurality of groups of lines each, said selector switches being arranged to extend telephone lines both to single group connector switches and to multi-group connector switches, and means included in said multi-group connector switches for automatically setting such switch on the terminals of a selected line in the proper group.

2. In a telephone system, telephone lines arranged in groups, selector switches, connector switches of a capacity to serve one group of lines each, connector switches of a,

capacity to serve a plurality of groups of lines each, said selector switches being arranged in their primary movements to extend telephone lines to rows of terminals leading to connector switches serving d-iflerent groups, and arranged in part of their secondary movements for extending telephone lines to particular connector switches serving the same group and in another part of their secondary movements for extending telephone lines to particular connector switches of increased capacity serving the same groups, and means included in said connector switches of increased capacity for automatically identifying the particular group to which the said selector swltches 1n the first part of their secondary movements are arranged to select.

3. In a telephone system, telephone hnes arranged in groups, selector switches, connector switches of a capacity to serve one group of lines,-connector switches of a capacity to serve a plurality of groups of lines, said selector switches be ng arranged in their primary movements to select a particular group of lines and being arranged in part of their secondary movements to select a particular connector switch serving the selected particular group of lines and being also arranged in another part of their secondary movements to select a particular connector switch of increased capacity serving both the selected particular group of lines and other groups of hnes, and means included within sald connector switch of increased capacity for automatically identifying the selected particular group of lines.

4. In a telephone system telephone hnes arranged in groups, selector switches, connector switches of a capaclty to serve one group of lines, connector switches of a capacity to serve a plurality of groups of lines, said selector switches being arranged to select by a primary movement a group of connector switches serving a particular group of lines including single group connector switches and multi-group connector switches and arranged to select by a secondary movement a particular one in said group of connector switches, and means included in said multi-group connector switches for automatically distinguishing between the several groups of lines thus served.

5. In a telephone system, groups o f telephone lines, single group selectlve switches, multi-group selective switches, and means included in said multi-group selective switches for automatically distinguishing between the several groups of lines served thereby.

6. In a telephone system, groups of telephone lines, single group selective switches, multi-group selective switches, and means individual to said multi-group connector switches for automatically directing the selection of a line within a preselected particular one of the several groups of lines served thereby.

7. In a telephone system, groups of telephone lines, single group connector switches, multi-group connector switches, selector switches arranged to extend telephone lines to connector switches serving particular groups of lines, and means individual to said multi-group connector switches for preserving the identity of the group of lines selected by said selector switches.

8. In a telephone system, groups of telephone lines, selector switches for interconnecting said lines, single group connector switches, multi-group connector switches, sets of terminals in said selector switches arranged in rows, sets of terminals in each row leading to single group connector switches serving the same group, other sets of terminals in each row leading to multigroup connector switches serving the same groups including the group served by the single group connector switches in that row, and means individual to the multi-group connector switches for preserving the identity of the row of terminals from which said telephone lines are extended.

9. In a telephone system, groups of telephone lines, single group connector switches, multi-group connector switches, terminals in said multi-group connector switches arranged in vertical and horizontal rows, said terminals of each group being interspersed with the terminals of each other group and arranged to recur periodically, and means individual to said multi-group connector switches for automatically causing said switch to extend telephone lines to others included in one or another of the groups of lines served thereby.

10. In a telephone system, telephone lines arranged in groups, selector switches, connector switches ofa capacity to serve one group of lines each, connector switches of a capacity to serve a plurality of groups of lines each, said selector switches being arranged to extend telephone lines to rows of terminals, certain terminals in each row being wired to single group connectors serving the same group of lines, other terminals in each row being wired to multi-group connectors serving other groups in addition to the group served by said single group connectors, and means individual to said multi-group connectors for automatically directing the setting of such connector within the group of lines served by the single group connectors wired to the row of terminals from which a line is extended.

In witness whereof, I hereunto subscribe my name this 28th day of December A. D., 1916.

HENRY P. CLAUSEN. 

